Note 14 - Segment and Geographic Information (Tables)

9 Months Ended

Dec. 31, 2015

Notes Tables

Revenue from External Customers by Geographic Areas [Table Text Block]

	Three Months Ended				Nine Months Ended
	December 31,				December 31,
	2015		2014		2015		2014
	(unaudited)				(unaudited)
United States	$	18,334	$	20,506	$	57,784	$	64,512
Europe and the Middle East
France		2,382		2,208		6,724		5,957
Germany		7,201		7,720		24,123		24,195
Italy		758		1,189		2,991		3,571
Russia		2,178		1,621		2,896		4,482
Sweden		422		1,138		1,701		3,732
United Kingdom		3,686		4,752		10,400		15,953
Other		5,798		6,020		18,889		19,913
Asia Pacific
China		19,090		20,949		60,378		61,831
Japan		1,451		1,675		7,175		5,637
Korea		5,360		4,661		17,585		16,789
Malaysia		689		1,197		3,253		4,319
Singapore		3,112		2,753		9,249		8,823
Thailand		997		996		3,032		3,023
Other		1,686		1,675		4,777		5,491
Rest of the World
India		1,095		1,150		3,136		3,779
Other		894		1,116		3,344		3,834
Total	$	75,133	$	81,326	$	237,437	$	255,841

Revenue from External Customers by Products and Services [Table Text Block]

	Three Months Ended December 31,				Nine Months Ended December 31,
	2015		2014		2015		2014
	(unaudited)				(unaudited)
Power semiconductors	$	51,196	$	52,245	$	159,607	$	165,993
Integrated circuits		18,749		23,484		63,257		70,804
Systems and RF power semiconductors		5,188		5,597		14,573		19,044
Total	$	75,133	$	81,326	$	237,437	$	255,841